bleeding brakes, soda stream brake fluid

[clipperjay]

Can you some how take it off and pressure test the M/C itself to see if all channels are pissing out fluid?
 

[Neo Badness]

Can you some how take it off and pressure test the M/C itself to see if all channels are pissing out fluid?
 

I dunno about a test that I run off the car but I think a mate may have a spare servo, master cylinder etc that he stripped off his before going widetrack. So I will ask him nicely and see where that leads me. 

Basically, with the engine running I can press the pedal pretty much to the floor, so something is not right.

[mk2bal]

It sounds like a m/cylinder to me. If air is getting in elsewhere, oil would be coming out (for the air to get in).. If your saying there is no sign of a leak, from m/cyl all the way to bleed nipples (ie the whole system), then I'd say its the m/cyl drawing air in slightly.it has rubber seals inside that perish.. Also two rubber seals where the reservoir bottle presses in to feed it can fail as well.. That 80quid would have paid for a new 1 as well I'd imagine!!

[BIG D]

I had this on mine the problem was the nipples on the rear calipers are halfway down and air gets stuck above them take the caliper off and clamp the piston and hold the nipple so its the highest point and try again i got loads of air out

Dave

[Neo Badness]

The fact that the brand new master cylinder I bought from Eurocarparts has 4 holes for brakelines as apposed to 2 like the original indicates that it's the wrong one. I was advised just to block off two of them with bleed nipples. This would appear to be, in hindsight, incorrect.

 My mate Boab, who has been nipping my head (in a good way) to get the car MOT'd and pulled a replacement OEM mastercylinder from his Aladdins cave of mk2 bits. Not too sure if it'll solve the problem or not but gotta be worth a punt, and I'm a dab hand at bleeding brakes now

Does have a 20 stamped on it so will need to double check it fits, if it's a 20mm one and I have a 16v that needs 22mm, never simple is it?

[emery1990]

So to bleed my brakes with car on the floor, would I jack it up, put the hose on the nipple then lower then undo nipple when needed ? I'm doing this either today or tomorrow, as car should be driveable this weekend hopefully.

[tech1889]

Mine has 4 holes and worked a treat when last fitted

[Neo Badness]

So to bleed my brakes with car on the floor, would I jack it up, put the hose on the nipple then lower then undo nipple when needed ? I'm doing this either today or tomorrow, as car should be driveable this weekend hopefully.

Just squeeze your hand in if you can with wheel on. Easier on the back than the fronts. Failing that 4 axle stands and take all the wheels off and go round like that. it's my preferred method, more hassle but easier if you know what I mean?

Mine has 4 holes and worked a treat when last fitted

Did it make a weird wheezing sound? Can you get fluid from all 4 nipple holes? How did you have the pipes setup?

[tech1889]

Nope no wheezing mate.. Duno never checked to see if fluid would come out.. I'm guessing they were routed as started I've removed them now as going to re route in the car 

[RossyB108]

My master cylinder from GSF that I bought a few months ago has 4 wholes too.  It came with two blanking screws, which is normal. Nothing to worry about there.